Thanks all of you for your help.
One more question regarding  vhost-user-blk-pci type device,  how to identify a vhost-blk disk in QEUM VM ?  for example, disk name looks like vda,vdb,..., but that some application in VM want to detect  that a certain entry is really the device it is waiting for. Specific for windows , they always show as disk 0, 1, 2….etc
Is there any way to identify those disk with each other in VM?

thanks


在 2021年5月17日，下午3:13，Michal Prívozník <mprivozn@redhat.com> 写道：

On 5/17/21 7:08 AM, Liang Chaojun wrote:

Thanks Michal and Peter for your response. I‘ m running it on qemu 5.1 build by myself. BTW, follow Peter’s suggestion, where I can get the latest rpms if I want to upgrade to Libvirt 7.1? As I know it seems need more than twenty related rpms not include dependency.

Well, since you're building qemu yourself you could also build libvirt.
Just be aware that the v7.3.0 release was the last one that supports
RHEL-7. Newer releases might still work, but upstream does not aim to
make everything work.

https://libvirt.org/platforms.html

Michal